Quote:
Originally Posted by jeyurkon
I wish the frame rates were different for my equipment. Using my Pioneer videodisc player as a source and my Sony DCR-TRV310 camcorder the black bar stays in one place making it look like a defect. It's amazing that the frame rates could be so close in frequency.
Maybe I should try my DVD player.
The camcorder has a slow shutter mode, but it makes it difficult to turn the brightness down low enough and the motion ends up being a bit jerky. It does eliminate the bar though.
John
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Yep... what you actually want is to have the camcorder at a slightly longer eposure... changing frame rates won't make a difference (apart from changing a black bar to a flicker)
What happens is that the dots start to fade a bit before the gun comes by for the next sweep; hence the black line staying in the same spot if the rates are matched). If they're off, the bar is all over the place, and thus you see the screen flicker or the black bar "crawl" No matter your camera's frame rate, it will still catch the black bar somewhere on screen, because the first bright dot and the last faded one will remain a constant distance apart.
If you have a longer exposure (darker light, lower shutter speed) , the camera will take a longer picture and the gun will make more than one pass, illuminating the darker dots twice in the same exposure, reducing the black bar effect. The trick is to time the exposure at the right speed... but it can be done.